It's a dehydrated food that you hydrate with warm water. I just bought some because I want to start slowly making my cats home made food and this has all the nutrients, vitamins minerals they need to thrive. I was going to mix some of this in with the home-made.

Sorry to hijack, but just want to mention that Prowl is not meant to be a vitamin mix for balancing a home made diet. It's supposed to be a stand-alone food and will become unbalanced if mixed with just meat. You can certainly supplement it with up to 15% fresh meat though. My other problem with Prowl is that it's pretty high in carbs. Nothing wrong with feeding it occasionally, I just wouldn't make it a main diet.